Jobs in the United States

25+ jobs

Added just now
Senior Principal Systems Development Engineer
Dell
TX
…solutions, and data management our customers need most. Our teams design and develop the hardware and software that connect infrastructure, accelerate computational workloads, integrate…
Added 2 mins ago
RH
Network Engineer
Robert Half
Memphis, TN
- $70 to $85 USD / hour
Job Summary We are seeking a skilled Network Engineer to design, implement, maintain, and support enterprise network infrastructure. The ideal candidate will have experience with routing,…
Added 3 mins ago
Mechanical Design Engineer
Actalent
Torrance, CA
Job Title: Mechanical Design EngineerJob DescriptionThe Mechanical Design Engineer creates accurate, parametric CAD models and detailed drawings for complex manufactured hardware across…
Added 4 mins ago
Mechanical Product Design Engineer I
Detroit Diesel Corporation
Detroit, MI
…fluids. This team takes pride in our global collaboration to design, test and release global powertrain technologies to the North American commercial vehicle…
Added 4 mins ago
A
Manufacturing Engineer
Actalent
Redmond, WA
- $70 to $77 USD / hour
Job Title: Manufacturing EngineerJob DescriptionAs a First Line Support - Manufacturing Engineer, you will be responsible for building, testing, qualifying, and producing next-generation…
Added 4 mins ago
Senior Mechanical Engineer
Actalent
Bellevue, WA
Job Title: Mechanical EngineerJob DescriptionWe are seeking a hands-on Mechanical Engineer to advance cutting-edge robotics hardware in a full-time, on-site role in Bellevue, WA. You will…
Added 4 mins ago
Electro Mechanical Engineer
Actalent
Kearny, NJ
Job Title: Electro Mechanical EngineerJob DescriptionThe Electro Mechanical Engineer designs and commissions bespoke reel-to-reel process machines that seamlessly integrate high-precision…
Added 4 mins ago
Mechanical Engineer
Actalent
Whippany, NJ
Job Title: Mechanical EngineerJob DescriptionThis Mechanical Engineer role focuses on designing and analyzing components and assemblies for aerospace applications, ensuring reliable…
Added 4 mins ago
A
Electronics Engineer
Actalent
Melbourne, FL
- $70 to $85 USD / hour
Job Title: Senior Electrical Engineer High-Speed Digital HardwareJob DescriptionThis Senior Electrical Engineer role focuses on leading the design, development, integration, and validation…
Added 4 mins ago
A
Test Rngineer
Actalent
Merritt Island, FL
- $36 to $43 USD / hour
Job Title: Integration and Test EngineerJob DescriptionThe Integration and Test Engineer defines, documents, analyzes, performs, and interprets tests for products, systems, components, and…
Added 5 mins ago
Firmware Engineer Co-op
Beckman Coulter, Inc.
Indianapolis, IN
Assist with the design, development, and debugging of embedded firmware using C/C++ and Python for automated laboratory instrumentation.
Added 7 mins ago
Software Engineer, Flight Software (Starship)
SpaceX
Cape Canaveral, FL · Brownsville, TX
As a Software Engineer on the Starship software team, you will design, develop, and test software that is used to both control and simulate SpaceX flight systems. You will engage with other…
Added 8 mins ago
K
Mechanical Engineer 3
Kforce
Fremont, CA
- $65 to $70 USD / hour
Kforce has a client in Fremont, CA that is seeking a Mechanical Engineer 3.
Added 11 mins ago
Project Engineer, DCCD
Amazon Data Services, Inc.
Stafford, VA
AWS Infrastructure Services owns the design, planning, delivery, and operation of all AWS global infrastructure. In other words, we’re the people who keep the cloud running. We support all…
Added 13 mins ago
Product Display Driver Engineer, Graphics, Games, and ML
Apple
Cupertino, CA
…looking for an outstanding, driven, diligent, and dedicated engineer to join the…
Added 13 mins ago
Modem System Test Engineer - Wireless Technologies and Ecosystems |
Apple
CA
…wireless innovations that impact millions of users worldwide! We design, validate, and integrate cutting-edge wireless technologies that enrich everyday experiences across our entire…
Added 13 mins ago
Mechanical Engineer II
Divergent
Torrance, CA
Divergent is building the new industrial age. Every day, our teams design, manufacture, and assemble advanced systems for some of the world’s most demanding industries. Our integrated…
Added 17 mins ago
ESS, Principal Software & Data Engineer
SK Battery America
Troy, MI
The Principal Software & Data Engineer will be a foundational member of the Energy Management Systems (EMS) engineering organization, responsible for designing and building the software and…
Added 17 mins ago
Senior Principal Systems Development Engineer
Round Rock, TX · TX
…solutions, and data management our customers need most. Our teams design and develop the hardware and software that connect infrastructure, accelerate computational workloads, integrate…
Added 19 mins ago
Sr. Cloud Engineer (Remote)
Inspira Financial
Oak Brook, IL
The Sr. Cloud Engineer will report to the Cloud Engineering Manager in the Technology Department. This role is responsible for the design, administration, maintenance, and support of the…
Added 19 mins ago
Optical Engineer
Corning
Fairport, NY
The engineer develops, launches, and maintains metrology systems for demanding applications. To do this, the engineer must become an expert-level user of the current interferometer…
Added 19 mins ago
P
Systems Engineer I
Paychex
Webster, NY · Allentown, PA · High Point, NC · West Palm Beach, FL · Cincinnati, OH · Saint Petersburg, FL · Tempe, AZ · Phoenix, AZ
- $61,000 to $95,900 USD / year
The Systems Engineer installs, configures, maintains, and upgrades server hardware, operating systems, middleware, and supporting infrastructure. The role proactively monitors system…
Added 20 mins ago
Research Engineer, Robotics - Roboticist
The Allen Institute for Artificial Intelligence
Seattle, WA
…stable and safe enough that researchers run experiments on hardware every day, and build the interfaces that learned policies plug into. Experience with humanoid whole-body control and with…
Added 20 mins ago
Lead Developer Enablement Engineer (Apple Infrastructure)
Vertiv
Westerville, OH · Indianapolis, IN
Vertiv is seeking a Lead Developer Enablement Engineer (Apple Infrastructure) to architect, deploy, and govern secure, enterprise-grade Apple infrastructure. This role is responsible for…
Added 23 mins ago
CI
Engineer, Electrical Design - Graduate Development Program
Celestica International LP
Maple Grove, MN
- $65,000 to $75,000 USD / year
Electrical Engineering – As a member of the design and development group, you will perform feasibility analysis, develop hardware architecture, develop designs and schematics for new…

Modem System Test Engineer - Wireless Technologies and Ecosystems |

CA, United States

The base pay range for this role is between $150,400 and $277,600, and your base pay will depend on your skills, qualifications, experience, and location.

Apply About employer

Applications open in a new tab.

Job details

Pay: The base pay range for this role is between $150,400 and $277,600, and your base pay will depend on your skills, qualifications, experience, and location.
Posting language: English
Posted: Nov 6, 2026

Original job description

Summary Join the Wireless Technologies and Eco-Systems (WTE) team and drive wireless innovations that impact millions of users worldwide! We design, validate, and integrate cutting-edge wireless technologies that enrich everyday experiences across our entire product ecosystem.

We are seeking a passionate, detail-oriented Modem Systems Test Engineer with a focus on Wireless Coexistence (COEX). In this role, you will be at the forefront of validating multi-radio platforms ensuring seamless concurrent operation between cellular technologies (LTE, 5G NR FR1/FR2) and adjacent radios such as Wi-Fi, Bluetooth, Ultra-Wideband (UWB), and GNSS. If you thrive in a fast-paced environment solving complex cross-radio interference, desense, and protocol arbitration challenges, we would love to hear from you.

Description In this role, you will be responsible for end-to-end system testing, performance characterization, and failure triage of advanced cellular baseband and multi-radio coexistence features. You will bridge baseband protocol software, RF hardware, and connectivity systems to guarantee robust real-world performance under hostile interference conditions.

You will rely on deep trace analysis, lab simulation, RF instrumentation, and automation to uncover edge-case performance degradation, desense mechanisms, and protocol timing collisions. Working cross-functionally with system architecture, firmware, protocol development, RF design, and carrier engineering, you will drive test coverage, root-cause complex issues, and influence system-level mitigation designs.

Responsibilities

Coexistence Test Design & Execution: Define, develop, and execute comprehensive test plans targeting in-device coexistence (IDC), inter-radio arbitration, multi-SIM / multi-active scenarios, and concurrent multi-band operation (LTE/5G NR with Wi-Fi, Bluetooth, UWB, and GNSS).

RF & Protocol Root-Cause Analysis: Analyze baseband protocol traces (PHY, MAC, RLC, PDCP, RRC), air-interface captures, and RF measurements to root-cause desense, throughput degradation, scheduling conflicts, dropped calls, and handover anomalies.

Mitigation & Feature Validation: Evaluate and validate dynamic coexistence mechanisms, including power back-off, time-division multiplexing (TDM) / frequency-division multiplexing (FDM) filtering, antenna switching/sharing, and adaptive link management.

Intelligent Test Automation: Develop robust, scalable test automation scripts and post-processing analytics pipelines in Python to automate test execution, KPI aggregation (BLER, throughput, latency), and anomaly detection.

Testbed & Environment Integration: Set up, calibrate, and maintain sophisticated lab testbeds incorporating cellular network emulators (call boxes), RF matrix switches, combiners, spectrum analyzers, and wireless channel emulators.

Cross-Functional Collaboration: Partner closely with baseband firmware, connectivity software, RF systems engineering, and hardware teams to reproduce lab/field defects, validate fixes, and verify 3GPP and internal performance specifications.

Minimum Qualifications Education: Bachelor’s or Master’s degree in Electrical Engineering, Computer Engineering, Telecommunications, or a related field.

Cellular Protocol Stack Expertise: Deep technical understanding of 3GPP LTE and 5G NR (Rel-15/16+) across Layer 1 (PHY), Layer 2 (MAC/RLC/PDCP), and Layer 3 (RRC/NAS).

Coexistence & RF Fundamentals: Strong grasp of RF transceiver architectures, in-device coexistence (IDC), antenna isolation, harmonics, intermodulation distortion (IMD), receiver desense, and multi-radio interference mitigation techniques.

Hands-on Validation Experience: Proven track record of system test, integration, or validation using commercial wireless network emulators (e.g., Keysight, Rohde & Schwarz, Anritsu) and RF instrumentation (spectrum analyzers, signal generators, power meters).

Automation & Scripting: Strong proficiency in Python for test automation, instrument control (SCPI/VISA), and automated parsing/analysis of large log datasets.

Analytical Problem Solving: Demonstrated capability to triage and root-cause multi-layer failures across hardware, firmware, and protocol interactions.

Preferred Qualifications Prior experience testing Dual-SIM / Dual-Active (DSDS/DSDA) or complex Cellular scenarios with simultaneous connectivity radios. Working knowledge of 3GPP in-device coexistence specifications (e.g., Rel-11+ IDC mechanisms, autonomous denial, auxiliary information reporting). Experience with non-cellular wireless standards (Wi-Fi 6/6E/7 - 802.11ax/be, Bluetooth 5.x, UWB, NFC, GNSS). Familiarity with data analysis and visualization libraries (Pandas, NumPy, Plotly/Matplotlib) for large-scale test KPI dashboards. Contributions to 3GPP standardization (RAN4, RAN5) or carrier certification testing for coexistence and performance. Proficiency in diagnosing complex system-level issues through lab/field experimentation, analytics, and log analysis. Excellent analytical & critical thinking skills, Excellent communication & interpersonal skills.

Pay & Benefits At Apple, base pay is one part of our total compensation package and is determined within a range. This provides the opportunity to progress as you grow and develop within a role. The base pay range for this role is between $150,400 and $277,600, and your base pay will depend on your skills, qualifications, experience, and location.

Apple employees also have the opportunity to become an Apple shareholder through participation in Apple’s discretionary employee stock programs. Apple employees are eligible for discretionary restricted stock unit awards, and can purchase Apple stock at a discount if voluntarily participating in Apple’s Employee Stock Purchase Plan. You’ll also receive benefits including: Comprehensive medical and dental coverage, retirement benefits, a range of discounted products and free services, and for formal education related to advancing your career at Apple, reimbursement for certain educational expenses - including tuition. Additionally, this role might be eligible for discretionary bonuses or commission payments as well as relocation. Learn more about Apple Benefits

Note: Apple benefit, compensation and employee stock programs are subject to eligibility requirements and other terms of the applicable plan or program.

EEO Statement Apple is an equal opportunity employer that is committed to inclusion and diversity. We seek to promote equal opportunity for all applicants without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, Veteran status, or other legally protected characteristics. Learn more about your EEO rights as an applicant

Accessibility At Apple, we believe accessibility is a fundamental human right. You’ll find that idea reflected in everything here - in our culture, our benefits and our digital tools. By welcoming as many perspectives as possible, we help you build a career where you feel like you belong.

Learn about accessibility in Apple’s workplace

Learn about reasonable accommodations for job applicants

Application Deadline Apple accepts applications to this posting on an ongoing basis.

Apply About employer

More about this job

Skills

Hardware testing methods
Firmware
Root cause analysis
Test automation
Python
Electrical engineering
Computer engineering
NAS
Problem solving
Reporting
Data analysis
NumPy
Critical thinking
Communication skills
Interpersonal skills

Report this job